There are many causes of knee pain in the elderly, including osteoarthritis, knee synovitis, rheumatism, rheumatoid arthritis, trauma and so on, and its treatment usually includes general treatment, physical therapy, medication, surgery and so on. 1. Osteoarthritis: When the pain is obvious, non-steroidal anti-inflammatory drugs such as ibuprofen can be used, and drugs such as sodium vitrate can be injected into the joint cavity, and physical therapy such as localized hot compresses can be combined, and surgical treatments such as knee arthroplasty can be carried out if necessary. 2. Knee synovitis: when the pain is obvious, painkillers such as ibuprofen can be used, and glucocorticosteroids such as sodium hyaluronate or trimethoprim can be injected into the joint cavity; if the above conservative treatment is ineffective, arthroscopic resection of the lesion is needed. 3. Rheumatoid and rheumatoid arthritis: in rheumatoid arthritis, cephalosporin antibacterial drugs and glucocorticosteroids such as prednisone can be used. Rheumatoid arthritis can be treated with non-steroidal anti-inflammatory drugs such as diclofenac sodium, and orthopedic surgery can be performed if the knee joint is deformed. 4. Trauma: Knee pain caused by trauma can be relieved by painkillers such as ibuprofen when the pain is severe; if there is ligament rupture, suture surgery is needed; if there is meniscus injury, repair surgery is needed; if there is fracture, internal fixation with incision and repositioning is needed, etc. The above medications should be used under the guidance of a doctor. The above medications need to be used under the supervision of a doctor. When parents experience pain in the knee that is not relieved by rest, it is recommended that they seek prompt medical attention to clarify the cause of the problem and receive targeted treatment.